import type { FormatDistanceFn, FormatDistanceLocale } from "../../../types.ts";

type FormatDistanceTokenValue =
  | string
  | {
      one: string;
      other: string;
    };

const formatDistanceLocale: FormatDistanceLocale<FormatDistanceTokenValue> = {
  lessThanXSeconds: {
    one: "不到 1 秒",
    other: "不到 {{count}} 秒",
  },

  xSeconds: {
    one: "1 秒",
    other: "{{count}} 秒",
  },

  halfAMinute: "半分钟",

  lessThanXMinutes: {
    one: "不到 1 分钟",
    other: "不到 {{count}} 分钟",
  },

  xMinutes: {
    one: "1 分钟",
    other: "{{count}} 分钟",
  },

  xHours: {
    one: "1 小时",
    other: "{{count}} 小时",
  },

  aboutXHours: {
    one: "大约 1 小时",
    other: "大约 {{count}} 小时",
  },

  xDays: {
    one: "1 天",
    other: "{{count}} 天",
  },

  aboutXWeeks: {
    one: "大约 1 个星期",
    other: "大约 {{count}} 个星期",
  },

  xWeeks: {
    one: "1 个星期",
    other: "{{count}} 个星期",
  },

  aboutXMonths: {
    one: "大约 1 个月",
    other: "大约 {{count}} 个月",
  },

  xMonths: {
    one: "1 个月",
    other: "{{count}} 个月",
  },

  aboutXYears: {
    one: "大约 1 年",
    other: "大约 {{count}} 年",
  },

  xYears: {
    one: "1 年",
    other: "{{count}} 年",
  },

  overXYears: {
    one: "超过 1 年",
    other: "超过 {{count}} 年",
  },

  almostXYears: {
    one: "将近 1 年",
    other: "将近 {{count}} 年",
  },
};

export const formatDistance: FormatDistanceFn = (token, count, options) => {
  let result;

  const tokenValue = formatDistanceLocale[token];
  if (typeof tokenValue === "string") {
    result = tokenValue;
  } else if (count === 1) {
    result = tokenValue.one;
  } else {
    result = tokenValue.other.replace("{{count}}", String(count));
  }

  if (options?.addSuffix) {
    if (options.comparison && options.comparison > 0) {
      return result + "内";
    } else {
      return result + "前";
    }
  }

  return result;
};
